4-Chloro-3-nitrobenzoic Acid

4-Chloro-3-nitrobenzoic acid is an off-white crystalline powder — an aromatic acid intermediate carrying both chlorine and nitro groups. Insoluble in water, soluble in ethanol and ether. The enhanced carboxylic acidity makes it suitable for preparing high-purity pharmaceutical impurity references and intermediates.

It is produced by nitration of p-chlorobenzoic acid or oxidation of p-chlorotoluene; the combination of nitration regioselectivity and oxidation process ensures product purity and isomer control.